See this blog post for more context on this 'library': http://chris.banes.me/2013/08/27/pushing-aars-to-maven-central/.

This is upto you.

This will include the username and password to upload to the Maven server and so that they are kept local on your machine. The location defaults to USER_HOME/.gradle/gradle.properties.

It may also include your signing key id, password, and secret key ring file (for signed uploads). Signing is only necessary if you're putting release builds of your project on maven central.

NEXUS_USERNAME=chrisbanes
NEXUS_PASSWORD=g00dtry

signing.keyId=ABCDEF12
signing.password=n1c3try
signing.secretKeyRingFile=~/.gnupg/secring.gpg

You may already have this file, in which case just edit the original. This file should contain the POM values which are common to all of your sub-project (if you have any). For instance, here's ActionBar-PullToRefresh's:

VERSION_NAME=0.9.2-SNAPSHOT
VERSION_CODE=92
GROUP=com.github.chrisbanes.actionbarpulltorefresh

POM_DESCRIPTION=A modern implementation of the pull-to-refresh for Android
POM_URL=https://github.com/chrisbanes/ActionBar-PullToRefresh
POM_SCM_URL=https://github.com/chrisbanes/ActionBar-PullToRefresh
POM_SCM_CONNECTION=scm:[email protected]:chrisbanes/ActionBar-PullToRefresh.git
POM_SCM_DEV_CONNECTION=scm:[email protected]:chrisbanes/ActionBar-PullToRefresh.git
POM_LICENCE_NAME=The Apache Software License, Version 2.0
POM_LICENCE_URL=http://www.apache.org/licenses/LICENSE-2.0.txt
POM_LICENCE_DIST=repo
POM_DEVELOPER_ID=chrisbanes
POM_DEVELOPER_NAME=Chris Banes

The VERSION_NAME value is important. If it contains the keyword SNAPSHOT then the build will upload to the snapshot server, if not then to the release server.

The values in this file are specific to the sub-project (and override those in the root gradle.properties). In this example, this is just the name, artifactId and packaging type:

POM_NAME=ActionBar-PullToRefresh Library
POM_ARTIFACT_ID=library
POM_PACKAGING=aar

Add the following at the end of each build.gradle that you wish to upload:

apply from: 'https://raw.github.com/chrisbanes/gradle-mvn-push/master/gradle-mvn-push.gradle'

You can now build and push:

$ gradle clean build uploadArchives

There are other properties which can be set:

RELEASE_REPOSITORY_URL (defaults to Maven Central's staging server)
SNAPSHOT_REPOSITORY_URL (defaults to Maven Central's snapshot server)

Copyright 2013 Chris Banes

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.